GPT-5.6 Solves a Tough Problem
No-Head-Royal · reddit · 2026-07-10
A Reddit user ran a quick experiment: GPT-5.6 Sol successfully solved a Codeforces problem that Fable 5 had previously failed to crack.
The post notes:
- Fable 5 had previously devolved into hallucinating nonsense when tackling similar problems in the standard web interface.
- GPT-5.6 Sol xhigh solved it in a single attempt, taking about 13 minutes.
- GPT-5.5 xhigh also failed to solve the same problem.
- The author remarked that such results would have seemed like magic 5 years ago, but are now accessible within a $20/month subscription.
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